402222212 has 12 divisors (see below), whose sum is σ = 804444480. Its totient is φ = 172380936.

The previous prime is 402222169. The next prime is 402222217. The reversal of 402222212 is 212222204.

402222212 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (402222217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7182512 + ... + 7182567.

It is an arithmetic number, because the mean of its divisors is an integer number (67037040).

Almost surely, 2^402222212 is an apocalyptic number.

It is an amenable number.

402222212 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

402222212 is a wasteful number, since it uses less digits than its factorization.

402222212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14365090 (or 14365088 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 402222212 is about 20055.4783538065. The cubic root of 402222212 is about 738.1682305847.

Adding to 402222212 its reverse (212222204), we get a palindrome (614444416).

The spelling of 402222212 in words is "four hundred two million, two hundred twenty-two thousand, two hundred twelve".